Very simple idea with great execution. I love the little character and the art style you chose. The tethering is great and has lots of potential to amp up challenges with moving orbs, blocked paths, and other ways to use the tether. There are some small issues with the bounciness of the tethering however, and it can sometimes to slow to respond so it makes levels frustrating. The screen could also be bigger or just constrained to one frame like Celeste to give more information and preplanning.